Campanula plant named &#39;pkm05&#39;

ABSTRACT

A new and distinct cultivar of  Campanula  plant named ‘PKM05’, characterized by its compact plant habit; globular plant form; vigorous growth habit; double white flowers and small leaves.

Latin name of genus and species of the plant claimed: Campanula hybrid.

Variety denomination: ‘PKM05’.

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinct cultivar ofCampanula hybrid plant, and hereinafter referred to by the name ‘PKM05’.

The new Campanula, ‘PKM05’, is a product of a planned breeding programconducted by the inventor, Christian Hald Madsen, in Sohus, Denmark. Thenew Campanula originated from a planned cross between two differentCampanula species; the female parent being an unnamed, proprietaryCampanula variety (unpatented) and the male parent being an unnamed,proprietary Campanula variety (unpatented). The initial crossing wasperformed in May 2013 by the Inventor, followed by further testing aftervegetative propagation since then. The inventor selected ‘PKM05’ on thebasis of white double flowers.

Asexual reproduction of the new Campanula cultivar by terminal cuttingshas demonstrated that the combination of characteristics as hereindisclosed for the new cultivar are firmly fixed and retained throughsuccessive generations of asexual reproduction. The new cultivarreproduces true-to-type.

SUMMARY OF THE INVENTION

The following traits have been repeatedly observed and are determined tobe the unique characteristics of ‘PKM05’. These characteristics incombination distinguish ‘PKM05’ as a new and distinct cultivar:

-   -   1. Upright plant habit with stiff stems.    -   2. Bushy globular plant form.    -   3. Vigorous growth habit, but still needing less chemical growth        retardation.    -   4. Double white flowers.    -   5. No need for vernalization

Plants of the cultivar ‘PKM05’ can be compared to the unpatentedcultivar Campanula×haydlodgensis ‘White Wonder’. In side-by-sidecomparisons conducted by the inventor in Sohus, Denmark, plants of theinstant cultivar ‘PKM05’ and plants of the cultivar ‘White Wonder’differ in the following characteristics:

-   -   1. Plants of ‘PKM05’ have larger flowers than ‘White Wonder’.    -   2. Plants of ‘PKM05’ have larger leaves than ‘White Wonder’.    -   3. Plants of ‘PKM05’ have a more upright plant habit than ‘White        Wonder’. Data on plants of the parent varieties are no longer        available for comparison with plants of the new cultivar        Campanula ‘PKM05’.

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

The accompanying colored photographs illustrate the overall appearanceof the new Campanula ‘PKM05’, showing the colors as true as it isreasonably possible to obtain in colored reproductions of this type.Colors in the photographs may differ slightly from the color valuescited in the detailed botanical description, which more accuratelydescribe the actual colors of ‘PKM05’.

FIG. 1 comprises a side perspective view of a typical flowering plant ofPKM05 grown in a 10.5 cm pot.

FIG. 2 comprises a close-up view of inflorescence of PKM05.

FIG. 3 comprises a close-up view of flowers of PKM05.

DETAILED BOTANICAL DESCRIPTION

The new Campanula ‘PKM05’ has not been observed under all possibleenvironmental conditions. The phenotype of the new cultivar may varywith variations in environment such as growth regulator treatment,temperature, light intensity, day length, and fertility level withoutany variance in genotype.

The aforementioned photographs, together with the followingobservations, measurements and values describe plants of the newCampanula ‘PKM05’ as grown under greenhouse conditions.

The age of the ‘PKM05’ plants described is 3 months after propagation.Color references are made to The Royal Horticultural Society ColourChart (R.H.S.), 5^(th) edition, except where general colors of ordinarysignificance are used.

-   Classification:    -   -   Botanical.—Campanula interspecific hybrid.-   Parentage:    -   -   Female or seed parent.—Campanula unpatented proprietary            selection.        -   Male or pollen parent.—Campanula unpatented proprietary            selection.-   Propagation:    -   -   Type cutting.—Terminal vegetative cuttings.        -   Time to initiate roots.—About 10 to 14 days at 18 to 21° C.            in tunnels in a greenhouse.        -   Root description.—Fine, well branched.-   Plant description:    -   -   Form.—Upright plant habit. Double to filled wide campanulate            flowers in panicles. Freely branching with lateral branches            forming at every node.        -   Crop time.—After rooting, about 12 weeks are required to            produce finished flowering plants in 10.5 cm pots.        -   Plant height (from soil level to top of plant plane).—About            18 cm. Depending on growth conditions.        -   Vigor.—Vigorous growth rate.-   Foliage description:    -   -   Leaf shape.—Single, dentate, cordate, palmate venation.        -   Leaf length.—up to 4 cm.        -   Leaf width.—up to 4 cm.        -   Apex.—Acute.        -   Base.—Cordate.        -   Margin.—Broadly dentate, undulate.        -   Texture.—Glabrous, stiff.        -   Color.—Upper Surface, RHS. N137A, Green Lower Surface,            between RHS. 137B and 137C (Green).        -   Venation color.—lighter green than or similar to leaf blade,            but areas too small to determine R.H.S. values.-   Inflorescence description:    -   -   Flower arrangement and shape.—Single, upright, double to            filled flowers in panicles with many flowers at lateral            branches, flowers with star shaped calyx.        -   Natural flowering season.—Continuous throughout spring and            summer. Season can be extended through long day treatments,            no vernalization needed.        -   Flower longevity.—Individual flowers up to three weeks.            Flowers persistent.        -   Inflorescence size.—Length: up to 17 cm.        -   Flowers.—Length: About 2 cm Diameter: About 4 cm Layers of            corollas: 3-4.        -   Corolla.—Length of tube: 20 mm Length of lobe: 10 mm Width            of lobe: 15 mm. Tip of lobe: acute and twisted.        -   Corolla color.—Upper and Lower surfaces, 155D, white.        -   Sepals.—Arrangement: Free and sessile. Quantity per            flower: 5. Length: 10 mm. Width: 3 mm. Overall shape:            Triangular Tip: Acute. Margin: Entire. Color (mature and            immature): Upper and lower surfaces: Green (areas too small            to give R.H.S. values) Pedicel: Length: up to 7 cm Diameter:            up to 2 mm Color: yellow-green.-   Reproductive organs:    -   -   Gynoecium.—Pistil and Stigma: Shape: Tripartite, can be            malformed Color: White green tip before opening.

I claim:
 1. A new and distinct cultivar of Campanula plant named‘PKM05’, as illustrated and described herein.